Milton Keynes · England
Sand mastic for sash & case windows in Lavendon, Milton Keynes
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Lavendon and across Milton Keynes. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Patchy fillers round a sash window
- Mastic dropping out of the joint
- A silicone bead on a sash window that spoils the look
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Sand mastic in Lavendon, done properly
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s made from sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. We work on timber door frames, brick reveals and period & listed homes, and people most often call us about old sand mastic that has cracked, crumbled or fallen out and a silicone bead on a sash window that spoils the look.
Somewhere as small as Lavendon, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Your job is guaranteed for a year, as with all our work.
- Place
- Lavendon (MK46)
- Wider area
- Milton Keynes
- Cover
- One year on every job
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Questions from Lavendon
Is sand mastic in Lavendon guaranteed?
All our work, in Lavendon and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Do you cover Lavendon for sand mastic?
Yes, Lavendon is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear price.
How long does the job take?
It depends on the size of the job, but as a guide it takes a few hours for a single window, longer for several. We’ll tell you when we quote.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we will quote it together.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
Are you insured?
Yes. We’re fully insured, and we’ve been doing sealant work for more than 20 years.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Nearby places to Lavendon
More services for Lavendon
Landlord and commercial work in Lavendon
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
If you manage several properties in or around Lavendon, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Different surfaces, different methods
Timber door frames
Round a period front door, sand mastic gives the right look.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
Windows and doors in Lavendon
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Turvey Abbey (about 2 miles east) are a reminder that the area around Lavendon has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you look after a building such as Lavendon School, larger buildings have plenty of frames, and the mastic around each one ages.
Lavendon is about 7 miles north-east of Newport Pagnell, in Milton Keynes. For sand mastic in and around Lavendon, please call 0345 464 0079 or send us an email for a quick quote. We cover Milton Keynes from our Crawley base. Our Milton Keynes coverage runs to 73 places, and Lavendon is one of them. You can also see our page for Oxford, roughly 38 miles from Lavendon.
Here we cover the MK46 postcode area for sand mastic. Whether your property is on High Street, Rectory Orchard and Orchard Walk or anywhere close by, our applicators can take on the job. If you’re just outside Lavendon, we cover Cold Brayfield (1 mile south-east) and Clifton Reynes (2 miles south-west). Further out, we also cover Milton Keynes (10 miles south-west), Bletchley (13 miles south), Newport Pagnell (7 miles south-west), Bletchley and Fenny Stratford (13 miles south), Furzton (12 miles south) and Whitehouse (12 miles south-west).
Local landmarks in Lavendon
Nearby you’ll also find Odell Castle (4.1 miles north-east). For a walk, there’s Pavenham Osier Beds.
What we cannot put right
Sealant is not the answer to every problem, and we’ll tell you before work begins. Sealant won’t put right:
- Masonry that needs repairing
- Putty and glazing repairs
- Rotten sashes, sills or window boxes (a joiner’s job)
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Stone surrounds
- Sash and case windows
- Tenement windows
- Brick reveals
- Period & listed homes
- Timber door frames
What happens on the day
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work starts. Most jobs take anything from a few hours to a full day, depending on how many windows. Somewhere as small as Lavendon, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Tell us if parking is tricky
- Mention if the joints have been sealed before
- Let us know if you’ve seen damp or leaks
How to get a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand.
Advice
When to call us in Lavendon
Paint, silicone or cement used over old mastic causes problems. They do not move with the timber, and they usually need raking out.
Most people get in touch when they notice something like this:
- Mastic dropping out of the joint
- Open joints round the window box
- Failed mastic on an exposed elevation
- A silicone bead on a sash window that spoils the look
Homes close to Church of St Michael include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- How long the guarantee is
- How the colour is chosen
- How the joint is cleaned and prepared
- How much experience the applicator has
Keeping the joints in good condition
After the cure time, these simple habits help:
- Renew mastic before redecorating the windows
- Ask us before painting near the mastic
- Make sure water runs off the sill
- Get any rot dealt with first
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.